WesBell Electronics
Wire and Cable Blog



Category: polyolefin heat shrink tubing

3:1 and 4:1 Shrinkable Tubing Products Pricing Online

Shrinkable Tubing ProductsWesBell is now offering 3:1 and 4:1 heat shrink tubing products online with pricing. You can purchase 100’, 500’ or 1000’ quantities on a spool or in 4’ lengths. We also have the ability to cut tubing to length through our value added services department. We’ve been using tubing products for over 15 years by manufacturing wire harnesses and cable assemblies, but we mostly used 2:1 flexible or adhesive versions.

3 to 1 Heat shrink tubing

The term 3:1, or 3 to 1, means that you divide by 3 to figure out what the tubing can shrink to. For instance, 1” tubing shrinks 67% to 1/3” and 3/4” tubing shrinks to 1/4”. So, if the application requires the tubing to shrink to 1/4″, why not just buy 1/2″, 2:1 instead? Well, first view the picture to the left, notice how the tubing is shrunk over two diameters because of the cable jacket. The tubing will have to be big enough to fit over the cable jacket and it will have to shrink enough to get down to the conductors. Therefore, 3/4″ 3:1 shrinkable tubing will fit over the 1/2″ cable jacket and it will shrink down to 1/4″ to fit tightly to the conductors.

4 to 1 Heat shrink tubing

The term 4:1, or 4 to 1, means that you divide by 4 to figure out what the tubing can shrink to. For instance, 1” tubing shrinks 75% to 1/4” and 3/4” tubing shrinks to .1875”. 4 to 1 tubing products come in a standard flexible version and an adhesive lined version. The adhesive line is glue that resides on the inside of the tubing wall and it melts when heat is applied. Once it dries there is a water tight seal that’s nearly impossible to remove. Adhesive lined tubing can be used as a splice kit to wire and cable because it holds the same attributes as far as temperature and voltage along with a water tight seal.

Please call if you have any questions about our tubing products (800) 334-8400.

3 to 1 Adhesive Heat Shrink Tubing Protection

Man is able to come up with innovative ways to protect electrical wire and cables through the years. Aside from the usual plastic coating or flexible sheaths, technology has provided for the development of tubing that is not only reliable and durable, but waterproof as well. It is a well known fact that moisture (or in general, water) has adverse effects on wires and electronic cables. Water can bring about corrosion and unnecessary disintegration of the conductor which may lead to greater losses, be it in residential, commercial, or industrial applications. Hence, the need for a reliable protector created a demanded for more creativity and innovation on the part of developers of wire and cable.  

Take 3 to 1 Adhesive Shrinkable Tubing as an example. It is developed around the idea of having two distinct parts, namely: the inner wall and the outer wall. It is important to note that the materials of construction used for each wall are two different components or materials. This is due to the fact that they are bound to play different roles in the shrinkable tubing. The outer wall is made of Polyolefin and is referred to as the heat shrink. On the other hand, the inner wall is commonly made of adhesive that melts down when subjected to heat. Since the tubing is made of two walls, it is usually referred to as dual wall tubing.

What happens to the 3 to 1 Adhesive Shrinkable Tubing when it is subjected to heat? Something good is bound to occur once the shrinkable tubing is subjected to temperature slightly lower than the known temperature of activation of the heat shrink. Once the optimal temperature is achieved, inner layer begins to take the gel form in such a way that it is like a stream of glue. After undergoing the process of heating and after everything cools down to the normal temperature, there exists a layer of adhesion between the shrinkable tubing and the wire. Not only that the resulting system is water proof, it is also assured that the wire or the component inside the shrinkable tubing will not experience any unnecessary movement that may be detrimental to the entire purpose of the electrical wiring.

The “3 to 1” in the nomenclature of the shrinkable tubing is rooted from the fact that it shrinks to 1/3 of the original diameter after subjecting it to the process of heating and cooling down. In addition, there is an estimated 15 percent average shrinkage rate if we look into the wire’s longitudinal aspect. In terms of standards, 3 to 1 Adhesive Shrinkable Tubing complies to the benchmark set by AMS-DTL-23053/4. The tubing can operate at temperatures between -55 degrees Celsius and 110 degrees Celsius. The shrink temperature is estimated to be at 90 degrees Celsius. The upper bound temperature, beyond which the tubing is expected to disintegrate is around 135 degrees Celsius.

Aside from insulation, this tubing can be used in wire identification, bundling of connectors, wire strain and stress relief, and insulation of solders.

WesBell Electronics Inc
(800) 334-8400

Alpha FIT® Heat Shrink Tubing Products

Alpha FIT® Heat Shrink Tubing is incredibly popular nowadays thanks to its many advantages. Especially made for wirings, the product is easy enough to use for DIY projects and is incredibly versatile. For those who want to find out if this product is best for them, following are some of the advantages of this tubing type.

Very Durable

This type of tubing is incredibly durable whether it’s exposed to extreme heat or moist surfaces. This makes it perfect for basement wirings, ensuring that homeowners wouldn’t have to worry about the tubing deteriorating due to the wetness. What’s even better is that this product doesn’t decay overtime and comes with an extra layer of tubing to protect against unpredicted pressure. Compared to traditional tubing methods, the heat shrinking type can last considerably longer, providing a very cheap cost per year. The tubing is also capable of resisting mold growth and even corrosion.

Safe to Use

As previously mentioned, the Alpha FIT® Heat Shrink Tubing comes with an extra layer of protection, significantly boosting its safety level. Specially made for insulation purposes, the product has incredibly high resistance against electrical impulses. This is perhaps why tubing is perfect for DIY projects. The extra level of protection makes it possible for inexperienced electricians to plan their own wirings without too much of a risk.

Perfect Fit

The biggest attraction of heat shrink tubing is the fact that it allows easy fitting on various components. The capacity of the tube to shrink provides an excellent sealant, ensuring that the tubing will cover all the important parts while sliding over the large objects.

How to Choose One

There are various considerations people must take into account when buying heat shrink tubing. Aside from the obvious requirements like voltage ratings and temperature capabilities, the product must have the perfect fit.

When determining the size, buyers must look closely at the shrink ratio. This refers to how small the tubing will be once it is exposed to heat. For example, a 6:1 ratio means that the tubing is 6 times larger than it would be once it starts to shrink. The ratios range from 6:1 to 2:1, allowing users to find the best size that is needed for their project.

Of course, also take note of the voltage and heat requirements mentioned above. Buyers should first consider exactly where they intend to install the tubing and the environmental factors in that situation. This way, they will be able to pick the best type that would fit their needs.

Alpha FIT® Heat Shrink Tubing is mostly used for wire insulation, protection against conductors, for water-proofing, for wire repair, covering against wires and cables as well as an abrasion resistance. Note that although it is incredibly easy to use, working with electricity still poses risks to the individual. This is why when it comes to complicated wirings, it is advised that people use the service of an electrician and utilize the heat shrink tubing for long-term protection against any problems.

Using Adhesive Polyolefin Heat Shrink Tubing

Providing protection for your home entails the right choices that must be made on your end. Every miscalculation or mistake that you make can dangerously bounce off to your home appliances or worse, to your children. Which is why you should make sure that electrical wires in your home will always stay hidden, secure and unexposed.

One way for you to achieve this is by using adhesive shrink tubing. Sure there is lots of heat shrink tubing available in the market — some are in fact, more affordable too. But the advantages offered by adhesive tubing makes it worth every penny you pay.

Better Shrink Ratio. The better shrink ratio offered by adhesive tubing allows you to use it for a wider range of applications – some of which are not related to wiring at all. Say for example your favorite power tool that has a damaged or barely hanging handle – you can fix the handle or just replace it altogether with the help of an adhesive tubing.

Compatibility. Unlike other heat shrink tubings that fall off or do not attach itself to the slippery materials or metals that it has to protect, adhesive shrink tubing easily bonds to a wide range of rubbers, metals or plastics. In fact, after you place the adhesive tubing on your conduits, the only thing you have to worry about would be its removal. This is because adhesive tubing does not rely solely on friction to bond to any material. The better adhesion provided by the thermoplastic adhesive ensures that the tubing will easily fit snugly to any material underlying it once temperature is applied.

Permanent seal of protection. The adhesive’s wall composition gives it cutting edge resistance and mechanical strength. It can also resist UV lights, sunlight, moisture, oils and chemicals because of its special water and chemical proof seal. You never have to worry about water or oil penetrating through your conduits. You don’t have to worry about corrosion and abrasion either. You never have to worry about the wires being exposed to dust because the tubing will conform snugly to any material even if they have irregular shapes or joints.

Flexibility. The adhesive tubing’s excellent physical and chemical properties make it very flexible to use. In fact, this type of tubing has now been introduced to different industries such as automotive, aerospace, military, telecommunications, transit and more.

Insulation. You never have to worry about your kids even if they accidentally stumble or play with your wires. The adhesive ensures perfect insulation on the outside no matter how much electricity is running inside the wires. As long as the wires are protected by the adhesive tubing, your children are protected too.

Making the right choices by investing in good tools mean providing better and lasting protection for your home. With the adhesive shrink tubing, you are doing more than investing in a good tool. You are also providing a safer environment where your kids are always free to run around and play.

Polyolefin Heat Shrink Tubing Products 2 to 1 Shrinkable Ratio

Polyolefin heat shrink products are very common in the wire and cable industry because they cover up wire splices, terminations and loose connections so that the conductors aren’t exposed. Each type of shrinkable tubing has specifications that match the type of wire and cable insulation so that they resist they same things when used together.

Polyolefin 2 to 1 shrink tubing is the most basic type of shrinkable tubing on the market. It’s like the hook up wire of the tubing industry because it can be used on a wide variety of applications for the cheapest cost. The “2 to 1” means that it can shrink down to half of its size which means you should get 1″ tubing if you have a 0.60″ wire diameter. It will be able to shrink as far down as 0.50″ for a nice snug fit over the wire or cable.

If you need shrink tubing for a wire with a terminal on the end then you’ll be better off getting a 3 to 1 heat shrink tubing. This type of tubing will shrink down onto the terminal and also shrink down onto the wire so that it’s a nice attractive finished look without any connection or conductor exposed.

For a more permanent application you might want to look at the adhesive lined polyolefin tubing. It has an adhesive glue on the inside wall so that when heated it melts and adheres to the wire or cable permanently. The adhesive tubing comes in 2 to 1, 3 to 1 and 4 to 1 if you have an uneven application.

Heat shrink tubing has many uses besides covering up connections and making the harness or assembly look nice. There is high temperature tubing, pvc non shrinkable tubing, thin wall tubing and much more to cover most all environments that tubing can be used in. Please call if you have any questions about our shrinkable tubing products as we have much more in stock than we have online. We offer free shipping over $250 and cut small lengths to help minimize costs.

WesBell Electronics Inc
(800) 334-8400